Yeah I wonder why RR still state for the merlin XX perfs in 1941 the following (quote)
Max T.O 3000rpm + 12lb/sq.in boost (M.S only)
Max climb 2650rpm + 9lb
Max all out level 3000rpm + 9lb
Max cruising 2650rpm +7b
But certainly RR R&D dep didn't new all abt field's Merlin.
Baahhh those stupid engineers ...
